Microwave 2 potatoes in their wrappers on high, 6-8 min, flipping over halfway through cook time (caution, that's a hot potato!); carefully cut in half, then set aside

Pat fillets dry + season with salt/pep; heat 1 tbsp oil in skillet over med-high (get that pan hot, otherwise the fish will stick); add to pan skin-side down + sear 5-6 min undisturbed until fish naturally releases from pan; flip fish over + cook 1-2 min until fish is cooked through

Heat 1 tbsp oil in large skillet over med-high; sauté half the spinach + salt/pep 1-2 min until wilted; add remaining spinach + cook 1-2 min more until all spinach is wilted

Divide ingredients to 2 plates